Telegraph instrument.



W. MoL. JACKSON. TELEGRAPH INSTRUMENT. APPLICATION IILED MAY 27, 1909.

Patented Apr. 5, 1910.

2 sums-81mm 1.

INVENTOI? KSON WITNESSES WILLIAM M. JRO

ATTORNEYS ANDREA acmmw (.0 pumommocmwsws.vmwmmon. n c

W. McL. JACKSON. TELEGRAPH INSTRUMENT.

APPLICATION rum) MAY 27, 1909.

Patented Apr.5, 1910.

2 sums-4mm 2.

INVENTOR WI LLIHM M. JACKSON WITNESSES A TTOHNE Y8 WILLIAM MCLEANJACKSON, 0F GASTONIA, NORTH CAROLINA.

TELEGRAPH INSTRUMENT.

Specification of Letters Patent.

Patented Apr. 5, 1910.

Application filed May 27, 1909. Serial No. 498,628.

To all whom it may concern:

Be it known that I, \ViLLnm McLnAN Jaonsox, a. citizen of the UnitedStates, and a resident of Gastonia, in the county of Gaston and State ofNorth Carolina, have made certain new and useful Improvements inTelegraph Instriu'nents, of which the following is a specification.

My invention relates to devices for facilitating the transmission ofmessages by means of telegraph instruments, and it consists in theconstructions, combinations and arrangements herein described andclaimed.

The main object of my invention is to provide means whereby the dotswhich are used in the ordinary Morse telegraph code may be made by thesingle pressure of a key, thereby doing away with the staccato movementof the finger of the operator. The long continued use of this movementcauses the finger and hand of the operator to become fatigued and oftenresults in telegraphers paralysis.

A further object of my invention is to provide means for automaticallyproducing a series of dots by a single pressure of the key and forproducing dashes by the pressure of another key while the first key isstill depressed with the finger resting easily on it.

Other objects and advantages will appear in the following specificationand the novel features of the device will be particularly pointed out inthe appended claims.

My invention is illustrated in the accompanying drawings in whichsimilar reference characters indicate like parts in the several viewsand in wl1ich Figure 1 shows a plan view of a telegraph transmitterconstructed according to my invention. Fig. 2 is a side view thereof.Fig. 3 is a detail View of the vibrator looking from the front of theinstrument. Fig. l is a detail view of the vibrator looking from therear of the instrument and Fig. 5 is a perspective view of the auxiliarykey.

In carrying out my invention I provide a main base A bearing thereon thebinding posts 13, C, and D. Carried by the main base is a key base Eupon which are the adjustable pivoted bearings F and G for the pivotsand g of the lever L. The key base also is provided with the bindingpost G. The lever L is provided with an insulated finger button M andconstitutes with the latter a key for sending dots. The key is providedwith an adjustable contact member N which is designed to limit themovement of the key in one direction while the stop 0 limits themovement in the other.

The construction of the vibratory memher and its operating lever is mostclearly shown in Figs. 3 and It consists of a metallic base 1 havingsecured thereto a U-shaped standard U. Pivotally secured to the latteris a Z-shapcd bell-crank lever V whose laterally extending portion '21carries a. thumb-screw o arranged to be engaged by the end Z of thelever L. The upper end of the Z-shaped bell-crank lever V has a laterally extending arm or pin o best shown in dotted lines in Fig. 2. Towardthe lower part of the upright support U is an adjustable stop member J.The vibratory member consists perferably of a cylindrical weight V onthe end of a rod Y which passes through an opening in the upper part ofthe support U being adj ustably secured thereto by means of theset-screw y. The rod Y has a reduced central portion 1 which constitutesa spring member and which is of suflicient resiliency to allow thecylinder W to vibrate back and forth. Secured to the base P is a secondupright Z which is provided with the adjustable member 2 and the bindingmember X.

The construction of the auxiliary key K is clearly shown in Fig. 5. Itconsists of a piece of spring metal which is clamped by means of thebinding screw F to the base E. Secured to the outer side of the strip 70is the thumb piece If. The metal strip 70 is provided with a contact 70arranged to engage the contact I) of the binding post B.

From the foregoing description of the various parts of the device theoperation thereof may be readily understood.

The binding posts 0 and D are the main binding posts to which the linewires extend. The binding post D is connected to the bind ing post X andalso to the binding post B while the binding post C is connected withthe plate P and with the binding post C on the base E. It will beobserved that when the button M is depressed the rear end of the lever Lwill press upwardly on the Z- shaped bell-crank lever V whose arm 42normally presses the rod Y against the stop J through the action of thespring S on the standard U.

The normal position of the vibrating device is shown in Fig. 3 and inFig. 4 the duce the dots.

rod Y which has been released by the pressureof the key" M swings overand makes contact with the screw 2. This is slightly beyond the verticalline of suspension ofthe rod Y which therefore vibrates back and forthand-makes and breaks the circuit at the point of contact. Since the baseP is connected with one of the main binding posts C and the contactmember 2 is in direct connection with the binding post D, the currentwill be made and broken to pro- Now if" a dash is wanted the operatorpresses the key Kin a side-wise direction with his thumb. The circuit ismade and broken" as the thumb movesback and forth and since'the bindingpost D is connected to the binding post" B and the binding post C tobinding post C, the circuit will be made and broken.

Let us assume that the operator wishes to send the word fix He firstpresses the button M thereby releasing the vibrator whichbegins tovibrate. As soon as the first connection is made whichis indicated by aclick of the'sounder (each of these instruments being associated-with asounder in the ordinary manner) he presses the auxiliary key 1C with histhumb and holds it for the usual length oftime 2'. c. for a length ortime equal tothat of three dots. Hethen releases the auxiliary key andpermits the vibrator 'which has been w' ibrating during this time tomake one-more contactthus completingthe letter f -After aninterval hepresses the button' M permitting the vibrator to make two dots sen dingthe letter i. For the letter x the-button M is depressed and held whilethe vibratoris making six contacts. After' the first contact,l1owever,the key K is=moved laterally and held for an interval of threedots after which it is released, and the vibrator allowed to make twodotsbefore the button M is finallyreleased.

It Will be observed that the movements required with this device aremuch less'than those required in the ordinary telegraphic sender.

I am aware that similar devices have been provided for the purpose ofdoing away with the numerous movements for the-sending of messages. Idesire to call'particular attention, however, tothe fact that'theauxiliary key -which makes the dashes is worked by lateral pressure andas clearly explained in the examples given", it is worked in connectionwith the key for sending dots Moreover in sending a dash while thevibrator'is operating thefinger operatingthe button M rests directlythereon and the hand does not'have to'be'held suspended while theauxiliary key is ma nipulated except with certain letterswhich beginwith a dash. The provisionof a supportingmeans for the hand while the apendulum securedto said support,-means for adjusting the lengthof-thependulum, a lever arranged to be operated-bysaid key for setting thependulumin motion, a spring for lrolding the lever 'in engagement-withthe key and an auxiliary key in a shunt cir cuit with said pendulum.

.3. In a telegraphic transmitter, a key pivotally mounted for movementup and down, a support, a pendulumadjustably secured to'said support, acontact arranged to beengaged by said pendulum, alever pivotally mountedon said support for settingthe pendulum in motion, a spring attached tothe upper end of said lever and to-thesupport for keeping the lever inengagement withthe key and an auxiliary key'in a shunt circuit with saidpendulum.

4. In a telegraphic transmitter, a key arranged to be moved up and down,a support, a bellcrank lever and a vibratorsecured to said support, anarm on said bell-crank lever arranged to-hold the vibrator normally outof a central position, a contact arranged to be'engaged by said vibratorwllen the'latter is released, a spring secured to said bellcrank leverand adapted to hold the latterin engagement with the key' and anauxiliary key having electrical connection with said vibrator andsaid'contact and arranged'to be moved in a lateraldirection' for sendingdashes.

In a telegraphic transmitter, abase, a lever pivoted on said base forupward and downward"movement, a spring secured to said base, a thumbpiece secured to said 'spr1ng,.the"faces of said thumb piece and saidspring being disposed in vertical" planes, a contact arranged atone sideof the'spring adapted to be engaged bythe latter when'the spring ismo'vedlaterally through pressure on the thumb piece and a vibratingdevice arranged to be actuated by the first named key,said vibratingdevicebeing in' shu-nt with said spring.

.WVILLIAM NIOLEiAN- JACKSON.

VVit-nesses:

ANNA" Mi H UTH, J. H. HILLYARD, J r.

